Power transforming apparatus Method for controlling the same and Air conditioner including the power transforming apparatus

摘要

The power converter of the present invention, the rectifier for rectifying the AC power source; A converter for boosting / stepping down or controlling the power factor of the DC voltage rectified by the rectifier; A power relay connected between the AC power source and the rectifier and switched by applying a PWM (pulse width modulation) signal; And a controller configured to apply and drive a PWM signal to the power relay, wherein the controller is configured to control the PWM after the power relay is switched on by an ON time signal of the PWM signal. The ON / OFF time of the PWM signal may be determined to maintain the switch ON state when the signal is an OFF time T2 signal.